Remove cirros version in the e2e config file, the cirros version relies on the devstack, when devstack changes the default cirros version, the e2e will be failed. The image select table which is used to create instance support fuzzy search image name, use cirros will be ok.
Change-Id: I4d9446313dca44040522356ca7551884332434ce
1. Add extenstions in config.yaml to support skip e2e case when service is disabled
2. Support compute, storage, network, other(identity, heat, configuration) config files to runthe corresponding cases
Change-Id: I310f4481d083319221045708cf5b311d51802b8c